Here's a two part video of X-Play's Top 10 Most Disappointing Sequels. There are some interesting choices but there are some old school games I'm inclined to add in there like
Earl Weaver Baseball 2 and
Questron 2 for me personally. If you don't want to watch the games are in order:
- Chrono Cross
- Devil May Cry 2
- Super Mario Sunshine
- Resident Evil 5
- Final Fantasy X-2
- Banjo Kazooie: Nuts and Bolts
- Star Wars Knights of the Old Republic 2
- Metal Gear Solid 2
- Neo Contra
- Perfect Dark Zero